Well........the angiograms did show narrowing and you do have intermittent claudication, so i would agree with the Consultant.
Trouble with "modern doctors" is that they only understand "links," robust clinical methods, nothing wrong with that, but the old fashioned method of raising the heel to relieve intermittent claudication was well established practice before angiography and bypass surgery.
My initial comment concerning the swelling of the legs remains the same being due to slow venous return, leading to pooling and swelling (oedema).
Again poor NHS care and communication.....in my opinion.